Async load in string format

Development Programming & Scripting
1

I’m trying to figure out what string format should be for async loading. FStreamableManager::RequestAsyncLoad take an const TArray<FSoftObjectPath>& TargetsToStream argument. Following functions calls into the engine i found function FStreamableManager::StreamInternal with the same argument and following code.

			// We always queue a new request in case the existing one gets cancelled
			FString Package = TargetName.ToString();
			int32 FirstDot = Package.Find(TEXT("."));
			if (FirstDot != INDEX_NONE)
			{
				Package = Package.Left(FirstDot);
			}

			Existing->bAsyncLoadRequestOutstanding = true;
			Existing->bLoadFailed = false;
			LoadPackageAsync(Package, FLoadPackageAsyncDelegate::CreateSP(Handle, &FStreamableHandle::AsyncLoadCallbackWrapper, TargetName), Priority);

It takes everything before first dot and tries to load it instead, using full name for callback it seems.
Next function int32 LoadPackageAsync(const FString& InName, const FGuid* InGuid, const TCHAR* InPackageToLoadFrom, FLoadPackageAsyncDelegate InCompletionDelegate, EPackageFlags InPackageFlags , int32 InPIEInstanceID, int32 InPackagePriority) where InName is a chunk of my actual string and nPackageToLoadFrom always nullptr, since it’s looking for some variable in FAsyncPackage class i don’t have access to.
What I’m trying to achieve is to mount pak file, read map asset and load it. That wasn’t going to well so i thought i’d to simply load asset first.

2

In FPackageName when loading function FindPackageFileWithoutExtension check if file exist on disk by asking platform specific code for time stamps. Mounted files does not exist in the mounting point as i expected them to be, but function IterateDirectoryRecursively show that they exist in the mounting point.

3

What I tried to do was to load pak file from another project, and that is something not supported.